(adsbygoogle = window.adsbygoogle || []).push({}); I downgraded with Rogero Downgrader 999 from Rebug DEX 4.78 and now i stuck on 3.55, i tried installing 3.40 firmwares because in Sustem Update says "Update Data of Version 3.40 or later can be installed on this system" but i got errors in XMB and in Recovery mode as well, tried using NoBD firmwares because BD on my console (My console is Slim CECH2508A) is broken and it doesnt helped me too, tried cfws and ofws, QA is toogled and i have Debug Settings, and for some reason i cant disable QA in Rebug Toolbox, when im trying to update from XMB im getting error code 80029CCA, when im trying to update from Recovery, it says that theres no updates found, tried formatting, restoring file system, rebuilding database but it doesnt helped me too.